The figure below shows trapezoid ABCD on a coordinate plane. Which of the following expressions represents the perimeter of this figure in units?
A
2
B
С
• 437-2174
4137
437+74
4/37+2774

I have a no clue m m m m m m m m m m h h m

-2 is the right

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!